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DNT24 Integration Guide - 10/19/11
Table of Contents
1.0 DNT24 Introduction.......................................................................................................................... 6
1.1 Why Spread Spectrum? ............................................................................................................ 6
1.2 Frequency Hopping versus Direct Sequence ........................................................................... 7
2.0 DNT24 System Overview ................................................................................................................ 8
2.1 Point-to-Point Systems.............................................................................................................. 8
2.2 Point-to-Multipoint Systems ...................................................................................................... 9
2.3 Store-and-Forward Systems ..................................................................................................... 9
2.4 RF Channel Access................................................................................................................. 10
2.5 DNT24 Addressing .................................................................................................................. 11
2.6 Network Linking and Slot Registration .................................................................................... 11
2.6.1
Fast Linking Techniques................................................................................................... 12
2.7 Transparent and Protocol-formatted Serial Data .................................................................... 12
3.0 DNT24 Application Interfaces ........................................................................................................ 13
3.1 Serial Ports .............................................................................................................................. 13
3.2 SPI Port ................................................................................................................................... 13
3.3 Digital I/O................................................................................................................................. 16
3.4 Analog I/O ............................................................................................................................... 16
3.5 I/O Event Reporting and I/O Binding....................................................................................... 17
4.0 DNT24 System Configuration ........................................................................................................ 17
4.1 Configuration Parameters ....................................................................................................... 17
4.2 Configuring a Basic Point-to-Point System ............................................................................. 18
4.3 Configuring a Basic Point-to-Multipoint System ...................................................................... 18
4.4 Configuring a Customized Point-to-Point or Point-to-Multipoint System ................................ 18
4.5 Configuring a Store-and-Forward System............................................................................... 20
4.6 Slot Buffer Sizes, Number of Slots, Messages per Hop and Hop Duration ............................ 21
5.0 DNT24 Application Interface Configuration ................................................................................... 23
5.1 Configuring the Serial Port ...................................................................................................... 23
5.2 Configuring the SPI Port ......................................................................................................... 23
5.3 Configuring Digital I/O ............................................................................................................. 23
5.4 Configuring Analog I/O ............................................................................................................ 23
5.5 Configuring I/O Event Reporting and I/O Binding ................................................................... 24
5.6 Configuring Sleep Mode.......................................................................................................... 25
6.0 DNT24 Hardware ........................................................................................................................... 27
6.1 Electrical Specifications........................................................................................................... 28
6.2 Module Pin Out........................................................................................................................ 29
6.3 Antenna Connector ................................................................................................................. 30
6.4 Power Supply and Input Voltages ........................................................................................... 31
6.5 ESD and Transient Protection................................................................................................. 31
6.6 Interfacing to 5 V Logic Systems............................................................................................. 31
6.7 Mounting and Enclosures........................................................................................................ 31
6.8 Labeling and Notices............................................................................................................... 32
7.0 DNT24 Protocol-formatted Messages ........................................................................................... 33
7.1 Protocol Formats ..................................................................................................................... 33
7.2 Message Types ....................................................................................................................... 33
7.3 Message Format Details ......................................................................................................... 34
